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Anthropic: Claude Opus 4.8 vs Google: Gemini 3.5 Flash

Last updated at: 2026-05-28

Metric Claude Opus 4.8 Claude Opus 4.8 medium Release: 2026-05-28 Gemini 3.5 Flash Gemini 3.5 Flash medium Release: 2026-05-19
Score 8.7 9.0
Rank #12 #6
Reliability 10.0 10.0
Consistency 9.6 9.6
Tests Correct
Attempt pass rate 83.3% 86.7%
Flaky tests 1 1
Total Runs 60 60
Cost per result 6.285 2.777
Total Cost $1.006 $0.472
Input Price $5.000 / 1M $1.500 / 1M
Output Price $25.000 / 1M $9.000 / 1M
Output Tokens 23,201 1,995
Reasoning Tokens 5,901 44,792
Response Time (avg) 9.34s 4.29s
Response Time (max) 38.03s 12.05s
Response Time (total) 186.84s 85.72s

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 3.95s 1,179 478
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.09s 171 3,385
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 14.97s 6,651 1,381
Gemini 3.5 Flash 6.8 6.2 66.7% 1 9.91s 455 13,323
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 9.8 10.0 100.0% 0 38.03s 5,260 1,588
Gemini 3.5 Flash 10.0 10.0 100.0% 0 12.05s 351 7,807
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 7.1 5.6 83.3% 1 12.29s 481 312
Gemini 3.5 Flash 10.0 10.0 100.0% 0 4.07s 279 3,784
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 5.3 10.0 33.3% 0 14.15s 7,477 900
Gemini 3.5 Flash 7.7 10.0 66.7% 0 5.24s 12 8,047
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 2.46s 237 0
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.52s 115 1,144
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 3.32s 373 320
Gemini 3.5 Flash 9.9 10.0 100.0% 0 2.70s 71 2,855
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 3.95s 791 483
Gemini 3.5 Flash 7.7 10.0 66.7% 0 2.38s 295 2,747
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 8.96s 301 225
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.81s 234 455
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 3.0 10.0 0.0% 0 6.14s 451 214
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.75s 12 1,245

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